18 Questions
What is the range of light wavelengths that short cones are sensitive to?
450-495 nm
What determines the perceived colour when the brain processes signals from cones?
The intensity of stimulation of each cone type
What is the term for the inability to distinguish certain shades of colour?
Colour blindness
What is the purpose of the eyes adapting to changes in lighting conditions?
To optimise colour vision
What is the role of the brain in colour vision?
To process signals from cones
What is the range of light wavelengths that long cones are sensitive to?
620-750 nm
What is the most common type of colour vision deficiency?
Deuteranomaly
What is the function of cones in the eye?
To recognize lights based on their wavelengths
What is the effect of Deuteranopia on colour perception?
Difficulty distinguishing between red and green colours
What is the cause of Protanomaly?
Abnormal function of red-green cones
What is the result of Tritanopia on colour perception?
Difficulty distinguishing between blue and yellow colours
What is the principle of image formation that occurs when light passes from one medium to another?
Refraction of light
What is the result of the loss of optic nerve axons in glaucoma patients?
Visual field defects
What is the term for islands of reduced sensitivity surrounded by better vision areas in patients with glaucoma?
Scotomata
How many types of cones are responsible for colour vision in the human retina?
Three
What is the location of the specialised photoreceptor cells responsible for colour vision?
Macula
What is the process by which light is converted into electrical signals in the eye?
Photoreception
What is the term for the fundamental aspect of human perception that allows humans to distinguish and interpret colours?
Colour vision
Test your understanding of how our eyes and brain work together to perceive different colours. Learn about the role of cones and the brain's processing of signals to create our colour vision.
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